Any uptrend/downtrend have to pass thru your so called 38% retracement. If it can successfully pass that point you will say it's uptrend/downtrend? why not before?
Profit taken occur only if current trend become suspected for any reason. Tl become suspected when it is about to break. Not for your fib. This fib is just for mental preparation.
Hope you understand.
You cannot learn better without losing